// Generate four random hex digits.
function S4() {
   return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
};
// Generate a pseudo-GUID by concatenating random hexadecimal.
export function guid() {
   return (S4()+S4()+""+S4()+""+S4()+""+S4()+""+S4()+S4()+S4());
};